OCP8135
Key Features
- Input Voltage Range : 2.7V to 5.5V synchronous boost converter, optimized for maximum
- Dual Channel Output
- 5A camera flash application and maximum 800mA
- Drives up to 1.5A Regulated Output Current movie mode applications using high-current white (0.75A per Channel) LEDs in all single cell Li-ion powered products. An
- High Efficiency PWM Boost Converter adaptive regulation method ensures the current for each LED remains in regulation and maximizes efficiency. M Two simple logic control inputs (ENM and ENF) enable and disable flash and movie mode operation of O the OCP8135. Movie-mode and Flash-mode current levels are independently fixed by two separate .C resistors (RM and RF). For Flash mode, a default timer can be used either to terminate a flash event or as a safety flash timer. In flash mode, the flash LED current can be programmed P in 16 steps by the 1-wire dimming interface at ENF pin. I One or two LEDs can be connected to the OCP8135; in the case of two LEDs the output current is matched H between each diode. Thermal regulation is integrated in Flash mode to -C limit the IC’s temperature and continuously provide the maximum allowed output current. The OCP8135 contain a thermal management system to protect the device; a internal over-voltage T protection (OVP) circuitry prevents damaged to the OCP8135 from open LED or open circuit conditions; N and a cycle-by-cycle current limit prevents damage to the OCP8135. Built-in circuitry prevents excessive E inrush current during start-up. The shutdown feature I reduces quiescent current to less than 1.0μA. The 2MHz switching frequency allow for the use of tiny, low profile (1uH or 2.2uH) inductors and 4.7uF R ceramic capacitors. The device is available in 14-pin 2mmX3mm DFN package and is rated over the -40°C W.O to 85°C.
- 2.0MHz Fixed Switching Frequency
- Up to 97% Efficiency with Small Inductor 1uH
- Integrated Soft-Start Eliminates Inrush Current
- Under Voltage Lock-Out
- Thermal management and Current Scale Back
